Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b7fc1e606111e2…

MALICIOUS

PDF

78.2 KB Created: 2021-07-14 09:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a7d1c7ebd656068b94bee4d4a379af95 SHA-1: 86276968a2e09c79ce835cb808e759a799d0c1c2 SHA-256: 82b7fc1e606111e2581db5ad367971f3316c9b531ad2e2f126730d073fcf957e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a redirector URL that appears to be part of a free download lure, aiming to trick users into visiting a phishing site. No scripts were extracted, but the presence of the malicious URL and the phishing lure strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8621

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/square?utm_term=a+kitchen+in+the+corner+of+the+house+pdf PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93a11b132fa36207454c5/1625897490456/fail_to_authenticate_from_external_provider_pubg_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edee3a895aae42f65bf090/1626205754835/segebejiverav.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e843fa8e76fa73c6604281/1625834490878/themes_and_context_of_indian_english_novel.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ece3d5cdb2ce13c51f6c35/1626137557811/90763268818.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9ac81d0b393375530938/1626118856395/78267359320.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE706 10680 bytes
SHA-256: 1b8642c7596977d3f2940097b6fbeac0dd7214753ed7b1b051b87e42afe79d34
font_02_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 17556 bytes
SHA-256: 5d3b4d9d90f0ad58b3d9e488c1ea318c9a4cc252cb9be4e31242fe02553fa2ea

Open this report in the interactive analyzer, or submit your own file for analysis.